Single (3)
'single' is the definition.
(not attached to a partner)
This is all the clue.
(Other definitions for unattached that I've seen before include "independent" , "Single" , "Not joined" , "Not belonging" , "Not married" .)
'single' is the definition.
(a single thing - only one)
This is all the clue.
(Other definitions for one that I've seen before include "Hour after midnight" , "SECOND PART OF 16" , "Single, sole" , "Single, unitary" , "United" .)
'single' is the definition.
(I know that single can be written as unmarried)
This is all the clue.
(Other definitions for unmarried that I've seen before include "Single in terms of partnership" , "Status of a bachelor" , "Not yet wed" .)
'single' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for unitary that I've seen before include "Single; uniform" , "showing one nature" , "Marked by oneness" , "as a whole" .)
'single' is the definition.
(synonyms)
This is all the clue.
(Other definitions for unwed that I've seen before include "Single" , "Not married" , "Without benefit of clergy?" , "Divorced" .)
'single' is the definition.
(synonyms)
This is all the clue.
(Other definitions for lone that I've seen before include "He likes to operate by himself" , "Single and isolated" , "Companionless" , "The ... Ranger, fictional masked cowboy" , "Unaccompanied" .)
'single' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for sole that I've seen before include "Underside of the foot" , "fish in the sea!" , "Bottom of the foot" , "Lone; part of foot" , "Shoe part -- lone" .)